J/{psi} polarization in photoproduction up to the next-to-leading order of QCD
Journal Article
·
· Physical Review. D, Particles Fields
- Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918(4), Beijing, 100049 (China)
We investigate the J/{psi} polarization in photoproduction at the Hadron Electron Ring Accelerator (HERA) up to the next-to-leading order of QCD. The results show that the transverse momentum p{sub t} and energy fraction z distributions of J/{psi} production do not agree with the observed ones very well. The theoretical uncertainties for the z distributions of the J/{psi} polarization parameters with respect to various choices of the renormalization and factorization scales are too large to give a definite predication. The uncertainties for the p{sub t} distributions of these parameters are small when p{sub t}>3 GeV and the obtained p{sub t} distributions cannot describe the experimental data even in this region.
- OSTI ID:
- 21322349
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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